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The order of stability of metal oxides i...

The order of stability of metal oxides is

A

`Cr_2O_3 lt MgO lt Al_2O_3 lt Fe_2O_3`

B

`Fe_2O_3 lt Cr_2O_3 lt Al_2O_3 lt MgO`

C

`Fe_2O_3 lt Al_2O_3 lt Cr_2O_3 lt MgO`

D

`Al_2O_3 lt MgO lt Fe_2O_3 lt Cr_2O_3`

Text Solution

Verified by Experts

The correct Answer is:
B
As stability is directly related to lattice energy and lattice energy depends on charge and size of ions. So, the order is:
`Fe_2O_3 lt Cr_2O_3 lt Al_2O_3 lt MgO`.
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